I found a new (limitied) colour at my local Aldi (Yes, Aldi sells nail polishes and beauty products in Germany.) which I decided to buy.

"Blackberry" isn't a real blackberry-colour, it is more a reddish berry tone with a hint of plum. The formula is like the one from "Chestnut" - liquid but not watery. Three thin (!) coats have been enough for an opaque finish. If you apply thicker coats, you should be fine with two. The drying time is okay (it's short).

It's not the most unique colour, I know, but if you don't have such a colour in your stash, you can't go wrong with the one by Biocura.